Reg Morris & Robert J. Payne
"Hampden" : the machines and postal markings attributed to The Hampden (Landfear) Cancelling Machine Co., 1896-1906 Machine Cancel Society Specialized study ; No. 9 - Zephyrhills, FL Machine Cancel Society - 0 pages
"Hampden" : the machines and postal markings attributed to The Hampden (Landfear) Cancelling Machine Co., 1896-1906 Machine Cancel Society Specialized study ; No. 9 - Zephyrhills, FL Machine Cancel Society - 0 pages